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Influence of Sample Temperature on the Process of Hot Spot Formation and Degradation after Powerful Laser Pumping
Author(s) -
Pronin D. A.
Publication year - 1992
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221730205
Subject(s) - hot spot (computer programming) , thermal conductivity , materials science , anthracene , laser , thermal , thermodynamics , degradation (telecommunications) , helium , conductivity , thermal conduction , chemistry , composite material , optics , electronic engineering , physics , organic chemistry , computer science , engineering , operating system
The degradation of a hot spot obtained near one of the surface of a thin crystal plate of anthracene at helium temperatures is investigated. The experimental results are discussed in terms of the local thermal conductivity with both specific heat and thermal conductivity as well‐known function of temperature. A good agreement between experimental results and model calculations is achieved. Analyzing the results of calculations a conclusion is drawn on the strong influence of sample temperature on the process of hot spot formation immediately after laser pumping. The role of the sample defectiveness is also discussed. The solution of the non‐linear thermal conductivity equation used to describe experimental results is analyzed. It was found that initial conditions strongly affect the time evolution of the hot spot width.